49 results on '"Salim, José"'
Search Results
2. Radiating Spherical Collapse for an Inhomogeneous Interior Solution
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Bittencourt, Eduardo, Freitas, Vanessa P, Salim, José M, and Santos, Grasiele B
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General Relativity and Quantum Cosmology - Abstract
We analyze the problem of gravitational collapse considering the matching of an exterior region described by the Vaidya's metric and an interior region described by a spherically symmetric shear-free inhomogeneous geometry sourced by a viscous fluid. We establish initial and final conditions for the process in order that the outcome be a non-singular object, when this is possible, and check how it depends on the fulfillment of the energy conditions. We then apply explicitly the matching procedure to the cases of linear and nonlinear Lagrangians describing electromagnetic fields inside the star, and analyze how the different behaviors for the scale factor of the interior geometry produce singular or nonsingular final stages of the collapse depending on the range where the initial conditions lie., Comment: 17 pages, 5 figures
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- 2018
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3. Síndrome pilórico en un body packer
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Laura Camila González-Villarreal, Salim José Barrios-Marenco, Luis Fernando Vélez-Cuorvo, Harold Enrique Betancourt Santos, and Roberto Hernando Cruz-Buitrago
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transporte intracorporal de contrabando ,obstrucción de la salida gástrica ,laparotomía ,body packing ,Surgery ,RD1-811 - Abstract
Introducción. El embalaje y transporte de estupefacientes dentro del organismo, o body packing, es una práctica frecuente en Centroamérica y el Caribe. Además del riesgo de muerte por la exposición a las sustancias tóxicas, existe el riesgo de complicaciones mecánicas con indicación de manejo quirúrgico. El Hospital de Engativá, por su cercanía al aeropuerto de Bogotá, D.C., Colombia, es el centro de referencia para el tratamiento de estos pacientes. Caso clínico. Un hombre de 65 años traído al hospital por un episodio emético con expulsión de cuatro cápsulas para el transporte de estupefacientes. Al examen físico se encontraron masas palpables en el hemiabdomen superior, sin abdomen agudo. La tomografía de abdomen informó un síndrome pilórico secundario a retención gástrica de cuerpos extraños. Fue llevado a laparotomía y gastrotomía logrando la extracción de 97 objetos cilíndricos de látex que contenían sustancias ilícitas. Discusión. En los body packer asintomáticos, la administración de soluciones laxantes es una estrategia terapéutica segura. Los casos reportados de obstrucción gastrointestinal son infrecuentes y se relacionan con la ingesta de un gran número de cápsulas, por lo que es necesario el tratamiento quirúrgico. Conclusión. El síndrome pilórico es una presentación infrecuente en un body packer. Se debe tener un alto índice de sospecha para garantizar un manejo oportuno.
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- 2022
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4. Stability of the accretion of a ghost condensate onto the Schwarzschild black hole
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Paz, Claudia A. Rivasplata, Salim, Jose Martins, and Bergliaffa, Santiago Esteban Perez
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General Relativity and Quantum Cosmology - Abstract
We study the linear stability of a nongravitating, steady-state, spherically symmetric ghost condensate accreting onto a Schwarzschild black hole using two methods. The first one is based on the conservation of the energy-momentum tensor of the perturbations (whose propagation is determined by the effective metric), and involves the determination of the sign of the time derivative of the energy of the perturbations. The second method employs the positivity of the effective potential. Both methods yield the result that the system is stable, but the second one is less practical, since it involves lengthier calculations and requires the explicit form of the background solution for the scalar field.
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- 2014
5. Magnetic fields and the Weyl tensor in the early universe
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Bittencourt, Eduardo, Salim, José, and Santos, Grasiele B. dos
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General Relativity and Quantum Cosmology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We have solved the Einstein-Maxwell equations for a class of isotropic metrics with constant spatial curvature in the presence of magnetic fields. We consider a slight modification of the Tolman averaging relations so that the energy-momentum tensor of the electromagnetic field possesses an anisotropic pressure component. This inhomogeneous magnetic universe is isotropic and its time evolution is guided by the usual Friedmann equations. In the case of flat universe, the space-time metric is free of singularities (except the well-known initial singularity at t = 0). It is shown that the anisotropic pressure of our model has a straightforward relation to the Weyl tensor. We also analyze the effect of this new ingredient on the motion of test particles and on the geodesic deviation of the cosmic fluid., Comment: 10 pages, 2 figures, new conceptual treatment of the early phenomenological work arXiv:1301.3079. Matches published version
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- 2014
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6. Scalar perturbations in a Friedmann-like metric with non-null Weyl tensor
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Santos, Grasiele B., Bittencourt, Eduardo, and Salim, José M.
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General Relativity and Quantum Cosmology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
In a previous work the authors have solved the Einstein equations of General Relativity for a class of metrics with constant spatial curvature, where it was found a non vanishing Weyl tensor in the presence of a primordial magnetic field with an anisotropic pressure component. Here, we perform the perturbative analysis of this model in order to study the gravitational stability under linear scalar perturbations. For this purpose, we take the Quasi-Maxwellian formalism of General Relativity as our framework, which offers a naturally covariant and gauge-invariant approach to deal with perturbations that are directly linked to observational quantities., Comment: 14 pages, 1 figure, improved version with a new analysis of the large wavelength limit. The current version matches the published one
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- 2013
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7. Comprehensive analysis of the distinct nano environments characteristics containing the different secondary structure elements: α- helices, β-sheets, and turns
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Mazoni, Ivan, primary, Salim, José Augusto, additional, Moraes, Fabio Rogerio, additional, Correa, Jorge Luiz, additional, Borro, Luiz, additional, and Neshich, Goran, additional
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- 2023
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8. Cosmological redshift and nonlinear electrodynamics propagation of photons from distant sources
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Cuesta, Herman J. Mosquera, Salim, Jose M., and Novello, M.
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Astrophysics - Abstract
By-now photons are the unique universal messengers. Cosmological sources like far-away galaxies or quasars are well-known light-emitters. Here we demonstrate that the nonlinear electrodynamics (NLED) description of photon propagation through the weak background intergalactic magnetic fields modifies in a fundamental way the cosmological redshift that a direct computation within a specific cosmological model can abscribe to a distant source. Independently of the class of NLED Lagrangian, the effective redshift turns out to be $1 + \tilde{z} = (1 + z) \Delta$, where $\Delta \equiv (1 + \Phi_e)/(1 + \Phi_o)$, with $\Phi \equiv {8}/{3} ({L_{FF}}/{L_F}) B^2$, being $L_F = {dL}/{dF}$, $L_{FF} = {d^2L}/{dF^2}$, the field $F\equiv F_{\alpha \beta} F^{\alpha \beta}$, and $B$ the magnetic field strength. Thus the effective redshift is always much higher then the standard redshift, but recovers such limit when the NLED correction $\Delta(\Phi_e, \Phi_o) \longrightarrow 1$. This result may provide a physical foundation for the current observation-inspired interpretation that the universe undergoes an accelerate expansion. However, under the situation analyzed here, for any NLED the actual (spatial) position of the light-emitting far-away source remains untouched., Comment: 5 pages, 3 figures, revtex4.sty
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- 2007
9. Nonlinear electrodynamics and the Pioneer 10/11 spacecraft anomaly
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Mbelek, Jean Paul, Cuesta, Herman J. Mosquera, Novello, M., and Salim, Jose M.
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Astrophysics ,General Relativity and Quantum Cosmology - Abstract
The occurrence of the phenomenon known as photon acceleration is a natural prediction of nonlinear electrodynamics (NLED). This would appear as an anomalous frequency shift in any modeling of the electromagnetic field that only takes into account the classical Maxwell theory. Thus, it is tempting to address the unresolved anomalous, steady; but time-dependent, blueshift of the Pioneer 10/11 spacecrafts within the framework of NLED. Here we show that astrophysical data on the strength of the magnetic field in both the Galaxy and the local (super)cluster of galaxies support the view on the major Pioneer anomaly as a consequence of the phenomenon of photon acceleration. If confirmed, through further observations or lab experiments, the reality of this phenomenon should prompt to take it into account in any forthcoming research on both cosmological evolution and origin and dynamical effects of primordial magnetic fields, whose seeds are estimated to be very weak., Comment: Final version accepted for publication in Europhysics Letters, uses EPL style, 7 pages
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- 2006
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10. Einstein's gravitational lensing and nonlinear electrodynamics
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Cuesta, Herman J. Mosquera, Pacheco, Jose' A. de Freitas, and Salim, Jose' M.
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Astrophysics ,General Relativity and Quantum Cosmology ,High Energy Physics - Phenomenology ,Physics - Classical Physics - Abstract
In 1936 Einstein predicted the phenomenon presently known as gravitational lensing (GL). A prime feature of GL is the magnification, because of the gravitational field, of the star visible surface as seen from a distant observer. We show here that nonlinear electrodynamics (NLED) modifies in a fundamental basis Einstein's general relativistic (GR) original derivation. The effect becomes apparent by studying the light propagation from a strongly magnetic ($B$) pulsar (SMP). Unlike its GR counterpart, the photon dynamics in NLED leads to a new effective GL, which depends also on the $B$-field permeating the pulsar. The apparent radius of a SMP appears then unexpectedly diminished, by a large factor, as compared to the classical Einstein's prediction. This may prove very crucial in determining physical properties of high $B$-field stars from their X-ray emission., Comment: 12(ws-ijmpa.cls) pages, 3 figures. Accepted for publication in IJMPA
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- 2004
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11. Nonlinear electrodynamics and the gravitational redshift of highly magnetised neutron stars
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Cuesta, Herman J. Mosquera and Salim, Jose' M.
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Astrophysics ,General Relativity and Quantum Cosmology ,Physics - Classical Physics - Abstract
The idea that the nonlinear electromagnetic interaction, i. e., light propagation in vacuum, can be geometrized was developed by Novello et al. (2000) and Novello & Salim (2001). Since then a number of physical consequences for the dynamics of a variety of systems have been explored. In a recent paper Mosquera Cuesta & Salim (2003) presented the first astrophysical study where such nonlinear electrodynamics (NLEDs) effects were accounted for in the case of a highly magnetized neutron star or pulsar. In that paper the NLEDs was invoked {\it a l\`a} Euler-Heisenberg, which is an infinite series expansion of which only the first term was used for the analisys. The immediate consequence of that study was an overall modification of the space-time geometry around the pulsar, which is ``perceived'', in principle, only by light propagating out of the star. This translates into an significant change in the surface redshift, as inferred from absorption (emission) lines observed from a super magnetized pulsar. The result proves to be even more dramatic for the so-called magnetars, pulsars endowed with magnetic ($B$) fields higher then the Schafroth quantum electrodynamics critical $B$-field. Here we demonstrate that the same effect still appears if one calls for the NLEDs in the form of the one rigorously derived by Born & Infeld (1934) based on the special relativistic limit for the velocity of approaching of an elementary particle to a pointlike electron [From the mathematical point of view, the Born & Infeld (1934) NLEDs is described by an exact Lagrangean, whose dynamics has been successfully studied in a wide set of physical systems.]., Comment: Accepted for publication in Month. Not. Roy. Ast. Soc. latex file, mn-1.4.sty, 5 pages, 2 figures
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- 2004
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12. Nonlinear electrodynamics and the surface redshift of pulsars
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Cuesta, Herman J. Mosquera and Salim, Jose M.
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Astrophysics - Abstract
Currently is argued that the best method of determining the neutron star (NS) fundamental properties is by measuring the {\it gravitational redshift} ($z$) of spectral lines produced in the star photosphere. Measurement of $z$ at the star surface provides a unique insight on the NS mass-to-radius relation and thus on its equation of state (EoS), which reflects the physics of the strong interaction between particles making up the star. Evidence for such a measurement has been provided quite recently by Cottam, Paerels & Mendez (2002), and also by Sanwal et {\it al.} (2002). Here we argue that although the quoted observations are undisputed for canonical pulsars, they could be misidentified if the NS is endowed with a super strong $B$ as in the so-called magnetars (Duncan & Thompson 1992) and strange quark magnetars (Zhang 2002), as in the spectral line discovered by Ibrahim et {\it al.} (2002;2003). The source of this new "confusion" redshift is related to nonlinear electrodynamics (NLEDs) effects., Comment: 5 pages, emulateapj.sty, accepted for publication in Astrophysical Journal
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- 2003
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13. Plant-pollinator Vocabulary - a Contribution to Interaction Data Standardization
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Salim, José Augusto, Zermoglio, Paula, Drucker, Debora, Soares, Filipi Miranda, Saraiva, Antonio, Agostini, Kayna, Freitas, Leandro, Wolowski, Marina, Rech, André, Maués, Marcia, and Varassin, Isabela
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IE. Data and metadata structures. - Abstract
Human demands on resources such as food and energy are increasing through time while global challenges such as climate change and biodiversity loss are becoming more complex to overcome, as well as more widely acknowledged by societies and governments. Reports from initiatives like the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) have demanded quick and reliable access to high-quality spatial and temporal data of species occurrences, their interspecific relations and the effects of the environment on biotic interactions. Mapping species interactions is crucial to understanding and conserving ecosystem functioning and all the services it can provide (Tylianakis et al. 2010, Slade et al. 2017). Detailed data has the potential to improve our knowledge about ecological and evolutionary processes guided by interspecific interactions, as well as to assist in planning and decision making for biodiversity conservation and restoration (Menz et al. 2011).
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- 2021
14. Flower-Insect Timed Counts (FIT Count): protocol adaptation and preliminary results in Brazil
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Soares, Filipi, primary, Koffler, Sheina, additional, Ghilardi-Lopes, Natalia, additional, Carvell, Claire, additional, Chiazzese, James, additional, Drucker, Debora, additional, Salim, José Augusto, additional, Albertini, Bruno, additional, Nunes-Silva, Patricia, additional, and Saraiva, Antonio, additional
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- 2023
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15. Using Structural and Physical–Chemical Parameters to Identify, Classify, and Predict Functional Districts in Proteins—The Role of Electrostatic Potential
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Neshich, Goran, Pena Neshich, Izabella Agostinho, Moraes, Fabio, Salim, Jose Augusto, Borro, Luiz, Yano, Inacio Henrique, Mazoni, Ivan, Jardine, Jose Gilberto, Rocchia, Walter, Rocchia, Walter, editor, and Spagnuolo, Michela, editor
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- 2015
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16. Flower-insect timed counts (FIT Count): protocol adaptation and preliminary results in Brazil
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Soares, Filipi Miranda, Koffler, Sheina, Ghilardi-Lopes, Natalia Pirani, Carvell, Claire, Chiazzese, James, Drucker, Debora P., Salim, José Augusto, de Carvalho Albertini, Bruno, Nunes-Silva, Patricia, Saraiva, Antonio Mauro, Soares, Filipi Miranda, Koffler, Sheina, Ghilardi-Lopes, Natalia Pirani, Carvell, Claire, Chiazzese, James, Drucker, Debora P., Salim, José Augusto, de Carvalho Albertini, Bruno, Nunes-Silva, Patricia, and Saraiva, Antonio Mauro
- Abstract
FIT Count (Flower-Insect Timed Counts) is a citizen science initiative that seeks to monitor flower visitation by diverse pollinator groups, including bumblebees, stingless bees, honeybees, flies, hummingbirds, among others. The protocol entails determining a 50 x 50 cm plot area around a target plant species, photographing the plant and conducting a standardized 10-minute survey on this area to estimate the frequency of flower visits by different pollinator groups. Conducting FIT Counts in different habitats and locations produces data on the temporal and spatial dynamics of these interactions.
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- 2023
17. Radiating spherical collapse for an inhomogeneous interior solution
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Bittencourt, Eduardo, Freitas, Vanessa P., Salim, José M., and Santos, Grasiele B.
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- 2019
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18. Síndrome pilórico en un body packer
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González-Villarreal, Laura Camila, primary, Barrios-Marenco, Salim José, additional, Vélez-Cuorvo, Luis Fernando, additional, Betancourt Santos, Harold Enrique, additional, and Cruz-Buitrago, Roberto Hernando, additional
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- 2022
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19. GBIF/DwC-A Taxon Graph Builder
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Salim, José
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Preliminary files generated by taxon-graph-builder (GloBI)
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- 2022
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20. Plant-pollinator Interaction Data: A case study of the WorldFAIR project
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Drucker, Debora, primary, Salim, José Augusto, additional, Trekels, Maarten, additional, Groom, Quentin, additional, Parr, Cynthia, additional, Soares, Filipi, additional, Agostini, Kayna, additional, Saraiva, Antonio, additional, Molloy, Laura, additional, Hodson, Simon, additional, and Gregory, Arofan, additional
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- 2022
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21. FIT Count Brasil: monitoramento de visitantes florais por contagem
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Koffler, Sheina, Soares, Filipi Miranda, Ghilardi-Lopes, Natalia Pirani, Albertini, Bruno, Drucker, Debora Pignatari, Salim, José Augusto, Nunes-Silva, Patricia, Francoy, Tiago Mauricio, Saraiva, Antonio Mauro, and Carvell, Claire
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Ciência cidadã ,Polinizadores ,Visitantes florais ,Ecologia da polinização ,Polinização ,Ecologia - Abstract
O FIT Count é um protocolo de ciência cidadã que tem como objetivo monitorar as visitas de polinizadores às flores (CARVELL et al., 2022). Ao realizar o monitoramento através do protocolo FIT Count, a(o) cientista cidadã(o) poderá compreender quais as espécies de plantas e grupos de visitantes florais que existem em suas redondezas, compreender quais os horários do dia ou períodos do ano em que há recursos florais e visitantes florais presentes em uma determinada localidade e contribuir para o banco de dados de monitoramento de longo prazo do projeto. Uma importante característica dos dados produzidos através do protocolo FIT Count é a informação sobre a quantidade de polinizadores em determinado local, ou seja, sua abundância. Com essas informações, é possível detectar se há manutenção ou declínio nas populações dos polinizadores e planejar ações de conservação quando necessário. Contamos com você para entender melhor a situação dos polinizadores no Brasil. Vamos começar?, Este livro foi produzido no âmbito do projeto SURPASS2, financiado pelo Newton Fund Latin America Biodiversity Programme: Biodiversity - Ecosystem services for Sustainable Development, concedido pelo UKRI Natural Environment Research Council (NERC - NE/S011870/2) em parceria com o Brasil /Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP - 2018/14994-1, 2019/26760-8)., {"references":["CARVELL, C. et al. Monitoramento da visitação de flores com Contagem Cronometrada de Visitantes Florais (FIT Count). In: GHILARDI-LOPES, Natalia Pirani; ZATTARA, Eduardo. Ciência cidadã e polinizadores da América do Sul. São Carlos: Editora Cubo, 2022. DOI: 10.4322/978-65-86819-20-5.s03c14.pt.","FLORA do Brasil 2020. Rio de Janeiro: Jardim Botânico do Rio de Janeiro, 2020. Disponível em: http://floradobrasil.jbrj.gov.br/. Acesso em: 6 abr. 2022.","UK POLLINATOR MONITORING SCHEME. Flower-Insect Timed Count guidance: version 5. Wallingford: UKCEH, 2021. Disponível em: https://ukpoms.org.uk/sites/default/files/pdf/FIT%20Count%20survey%20guidance%20v5_1.pdf. Acesso em: 4 abr. 2022."]}
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- 2022
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22. Indexing Biotic Interactions in GBIF data
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Salim, José Augusto, primary, Seltmann, Katja, additional, Poelen, Jorrit, additional, and Saraiva, Antonio, additional
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- 2022
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23. FIT Count Brasil: aplicativo para monitoramento de polinizadores
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Koffler, Sheina, Soares, Filipi Miranda, Ghilardi-Lopes, Natália Pirani, Albertini, Bruno, Drucker, Debora, Salim, José Augusto, Nunes-Silva, Patrícia, Francoy, Tiago Mauricio, Saraiva, Antonio Mauro, Carvell, Claire, and Services, Cybersecurity & Safety
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pollination ,pollinator ,Biodiversity ,Citizen science - Published
- 2022
24. Data standardization of plant–pollinator interactions
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Salim, José A, primary, Saraiva, Antonio M, additional, Zermoglio, Paula F, additional, Agostini, Kayna, additional, Wolowski, Marina, additional, Drucker, Debora P, additional, Soares, Filipi M, additional, Bergamo, Pedro J, additional, Varassin, Isabela G, additional, Freitas, Leandro, additional, Maués, Márcia M, additional, Rech, Andre R, additional, Veiga, Allan K, additional, Acosta, Andre L, additional, Araujo, Andréa C, additional, Nogueira, Anselmo, additional, Blochtein, Betina, additional, Freitas, Breno M, additional, Albertini, Bruno C, additional, Maia-Silva, Camila, additional, Nunes, Carlos E P, additional, Pires, Carmen S S, additional, dos Santos, Charles F, additional, Queiroz, Elisa P, additional, Cartolano, Etienne A, additional, de Oliveira, Favízia F, additional, Amorim, Felipe W, additional, Fontúrbel, Francisco E, additional, da Silva, Gleycon V, additional, Consolaro, Hélder, additional, Alves-dos-Santos, Isabel, additional, Machado, Isabel C, additional, Silva, Juliana S, additional, Aleixo, Kátia P, additional, Carvalheiro, Luísa G, additional, Rocca, Márcia A, additional, Pinheiro, Mardiore, additional, Hrncir, Michael, additional, Streher, Nathália S, additional, Ferreira, Patricia A, additional, de Albuquerque, Patricia M C, additional, Maruyama, Pietro K, additional, Borges, Rafael C, additional, Giannini, Tereza C, additional, and Brito, Vinícius L G, additional
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- 2022
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25. Plant-pollinator Vocabulary - a Contribution to Interaction Data Standardization
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Salim, José Augusto, primary, Zermoglio, Paula, additional, Drucker, Debora, additional, Soares, Filipi, additional, Saraiva, Antonio, additional, Agostini, Kayna, additional, Freitas, Leandro, additional, Wolowski, Marina, additional, Rech, André, additional, Maués, Marcia, additional, and Varassin, Isabela, additional
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- 2021
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26. Aplicação de técnicas de reconhecimento de padrões usando os descritores estruturais de proteínas da base de dados do software STING para discriminação do sítio catalítico de enzimas
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Salim, José Augusto, 1986, Von Zuben, Fernando José, 1968, Zuben, Fernando José Von, 1968, Coelho, Guilherme Palermo, Aparicio, Ricardo, Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação, Programa de Pós-Graduação em Engenharia Elétrica, and UNIVERSIDADE ESTADUAL DE CAMPINAS
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Reconhecimento de padrões ,Enzimas ,Pattern recognition ,Machine learning ,Aprendizado de máquina ,Catalysis ,Catálise enzimática ,Enzymes - Abstract
Orientadores: Fernando José Von Zuben, Goran Neshich Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação Resumo: As enzimas têm sua função determinada essencialmente por alguns resíduos específicos, denominados resíduos de aminoácidos catalíticos. A função de uma determinada proteína é mantida por milhares de anos de pressão seletiva que ocasionam a preservação de uma estrutura composta por padrões físicos, químicos e estruturais necessários para mantê-la. É frequente observar que enzimas quaisquer presentes em organismos distantemente relacionados exerçam exatamente a mesma função biológica e possuam o mesmo conjunto de resíduos de aminoácidos catalíticos, apesar de possuírem sequências proteicas muito dissimilares. Estes padrões que se conservaram por anos de evolução para manter a função das enzimas têm sido bastante estudados na literatura. Assim, o presente trabalho buscou identificar, dentre os descritores estruturais de proteínas (disponíveis na base de dados da plataforma Blue Star STING) aqueles de maior relevância para discriminar os resíduos de aminoácidos catalíticos dos não catalíticos, por meio do nanoambiente no qual estes se inserem. Buscou-se por modelos classificadores capazes de favorecerem uma interpretação de suas escolhas através de regras na forma SE-ENTÃO, compostas por descritores e seus respectivos valores. Regras foram extraídas para conjuntos de enzimas responsáveis pela catálise da mesma reação enzimática (mesma sub-subclasse EC), de forma a caracterizar o nanoambiente comum aos seus resíduos de aminoácidos catalíticos. Primeiramente, foram considerados apenas descritores estruturais de proteínas, ou seja, excluem-se descritores de conservação de estrutura primária. Esta opção foi feita com base no fato de a conservação de um determinado resíduo em uma determinada posição ser uma consequência (e não causa) de sua crucial função para a atividade de uma enzima. Buscou-se, portanto, compreender a fundo o "por que" de um resíduo ser conservado, utilizando uma "linguagem" puramente estrutural. As doze mais representativas sub-subclasses EC foram escolhidas e regras foram extraídas de forma a caracterizar os resíduos de aminoácido catalíticos de seus membros. Os resultados obtidos variam de acordo com o número de amostras catalíticas disponíveis, sendo as classes com maior número de amostras as que resultaram em regras com maior capacidade de generalização. Ainda que a caracterização dos resíduos de aminoácidos catalíticos possa ser feita apenas com os dados disponíveis, a predição de novas amostras introduz diversos desafios discutidos neste trabalho. Diferentes técnicas de amostragem e seleção de atributos foram estudadas e o impacto de tais técnicas no treinamento é também discutido. Novos descritores estruturais de proteína foram adicionados ao Blue Star STING, assim como foi feito o desenvolvimento de uma biblioteca de programação para facilitar e agilizar a extensão do conjunto de descritores do Blue Star STING Abstract: The function of enzymes are determined by specific residues, called catalytic amino acids residues. The protein function is maintained for thousands of years of selective pressure which preserves in its structure many physical-chemical and structural patterns. Frequently, enzymes from distinct organisms exert exactly the same biological function due to similar catalytic amino acid residues, even with low sequence similarities. The majority of catalytic amino acid residues prediction methods use sequence conservation features to provide classification. Seeking to understand these conserved patterns in enzyme structures, that even after years of evolution perform the same biological function, the present work searches to identify which protein structural descriptors (available in Blue Star STING platform) are capable of discriminating the amino acid catalytic residues from non-catalytic residues by means of their nanoenvironments properties. Therefore, we studied the use of classification methods available in the literature and STING structural protein descriptors to predict amino acid catalytic residues with no dependency of homologous enzymes. Considering methods capable of extracting IF-THEN rules composed of descriptors and their respective values, sets of rules were built to characterize the amino acid catalytic residues of enzymes catalyzing the same chemical reaction (same EC sub-subclass). Furthermore, it was considered only structural protein descriptors, i.e. no sequence conservation descriptor were considered. The conservation of certain amino acid in a given position is a consequence (not cause) of its crucial function for the enzyme activity. Therefore, the main purpose was to understand in depth the reason why a residue is preserved, employing a purely structural language. Twelve most representative EC sub-subclasses were considered and rules were extracted to characterize the amino acid catalytic residues of their members. The results vary as the number of available structures for each sub-subclass increases. Once it is possible to characterize the amino acid residues of a set of enzymes catalyzing the same chemical reaction, the prediction of amino acid residues in new enzymes faces several challenges discussed in this work, been the major problem the lack of data for amino acid catalytic residues in available databases. Many different techniques as sampling and feature selection methods are employed to alleviate the imbalance of data, and their impact on training are discussed. As a result, we also incorporate new structural protein descriptors to Blue Star STING and developed a new programming library to allow faster and easier extension of the Blue Star STING descriptors set Mestrado Engenharia de Computação Mestre em Engenharia Elétrica FAPESP CAPES
- Published
- 2021
27. A dinâmica do conhecimento sobre o escoamento pelo tronco: uma revisão sistemática
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Tonello, Kelly Cristina, Rosa, Alexandra Guidelli, Salim, José Augusto, Correa, Carina Julia Pensa, and Lima, Marcelle Teodoro
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Environmental sciences ,hidrologia florestal ,restauração florestal ,reparticionamento de chuvas ,precipitação interna ,ciclo biogeoquímico ,conservação de ecossistemas ,forest hydrology ,forest restoration ,rainfall repartitioning ,throughfall ,biogeochemical cycle ,GE1-350 ,hidrologia ,repartição de chuva - Abstract
The importance of stemflow to hydrology and biogeochemistry in forest ecosystems is highlighted by the growing interest of the scientific community since the 1970s. This paper summarizes the main contributions of stemflow (SF) studies from recent years through a systematic review of the literature, including 375 scientific articles published between 2006 and 2019. Shrub SF has shown superior efficiency (11.1%) compared to tree species (3.6%). Branches, bark texture and composition, branch and leaf saturation capacity, and wind intensity were identified as factors that significantly influence SF.However, despite the increasing number of publications on the subject, most of them focus on semi-arid regions of Asia, particularly of China, and temperate regions. Thus, there is still a lack of knowledge about therole of the different species in the biogeochemical cycle concerning the SF in tropical and semi-equatorial regions. A importância do escoamento pelo tronco para a hidrologia ebiogeoquímica dos ecossistemas florestais é destacada pelo crescenteinteresse da comunidade científica desde os anos 1970. Para resumiras principais contribuições dos estudos de escoamento pelo tronco (Sf)dos últimos anos, este trabalho apresenta uma revisão sistemática daliteratura, incluindo 375 publicações científicas de 2006 e 2019. O Sf emarbustos demonstrou uma eficiência superior (11,1%) ao escoamentopelo tronco em espécies arbóreas (3,6%). Galhos, textura e composiçãodas cascas, capacidade de saturação das folhas e intensidade dosventos foram identificados como os fatores que mais influenciam o Sf.No entanto, apesar do crescente número de publicações sobre o tema,a maioria concentra-se em regiões semiáridas da Ásia, principalmentena China e em regiões temperadas. Assim, para as regiões tropical esemiequatorial, ainda há um desconhecimento sobre o papel dasdiferentes espécies no ciclo biogeoquímico em relação ao Sf.
- Published
- 2021
28. A Google Sheet Add-on for Biodiversity Data Standardization and Sharing
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Salim, José Augusto, primary and Saraiva, Antonio, additional
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- 2020
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29. The dynamics of knowledge about stemflow: a systematic review
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Tonello, Kelly Cristina, primary, Rosa, Alexandra Guidelli, additional, Salim, José Augusto, additional, Correa, Carina Julia Pensa, additional, and Lima, Marcelle Teodoro, additional
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- 2020
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30. Study of specific nanoenvironments containing α-helices in all-α and (α+β)+(α/β) proteins
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Mazoni, Ivan, primary, Borro, Luiz César, additional, Jardine, José Gilberto, additional, Yano, Inácio Henrique, additional, Salim, José Augusto, additional, and Neshich, Goran, additional
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- 2018
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31. Brazilian Network on Plant-Pollinator Interactions: an update on the initiative of a standard for plant-pollinator interactions data
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Salim, José Augusto, primary, Saraiva, Antonio, additional, Agostini, Kayna, additional, Wolowski, Marina, additional, Veiga, Allan, additional, Silva, Juliana, additional, and Carvalheiro, Luisa, additional
- Published
- 2018
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32. Brazilian Plant-Pollinator Interactions Network: definition of a data standard for digitization, sharing, and aggregation of plant-pollinator interaction data
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Saraiva, Antonio, primary, Salim, José, additional, Agostini, Kayna, additional, Wolowski, Marina, additional, Silva, Juliana, additional, Veiga, Allan, additional, and Albertini, Bruno, additional
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- 2017
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33. Plant-pollinator Vocabulary - a Contribution to Interaction Data Standardization.
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Augusto Salim, José, Zermoglio, Paula F., Drucker, Debora P., Miranda Soares, Filipi, Saraiva, Antonio Mauro, Agostini, Kayna, Freitas, Leandro, Wolowski, Marina, Rech, André R., Maués, Marcia M., and Varassin, Isabela G.
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POLLINATORS ,CLIMATE change ,BIODIVERSITY ,SCIENTIFIC literature ,SUSTAINABLE agriculture - Abstract
Human demands on resources such as food and energy are increasing through time while global challenges such as climate change and biodiversity loss are becoming more complex to overcome, as well as more widely acknowledged by societies and governments. Reports from initiatives like the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) have demanded quick and reliable access to high-quality spatial and temporal data of species occurrences, their interspecific relations and the effects of the environment on biotic interactions. Mapping species interactions is crucial to understanding and conserving ecosystem functioning and all the services it can provide (Tylianakis et al. 2010, Slade et al. 2017). Detailed data has the potential to improve our knowledge about ecological and evolutionary processes guided by interspecific interactions, as well as to assist in planning and decision making for biodiversity conservation and restoration (Menz et al. 2011). Although a great effort has been made to successfully standardize and aggregate species occurrence data, a formal standard to support biotic interaction data sharing and interoperability is still lacking. There are different biological interactions that can be studied, such as predator-prey, host-parasite and pollinator-plant and there is a variety of data practices and data representation procedures that can be used. Plant-pollinator interactions are recognized in many sources from the scientific literature (Abrol 2012, Ollerton 2021) for the importance of ecosystem functioning and sustainable agriculture. Primary data about pollination are becoming increasingly available online and can be accessed from a great number of data repositories. While a vast quantity of data on interactions, and on pollination in particular, is available, data are not integrated among sources, largely because of a lack of appropriate standards. We present a vocabulary of terms for sharing plant-pollinator interactions using one of the existing extensions to the Darwin Core standard (Wieczorek et al. 2012). In particular, the vocabulary is meant to be used for the term measurementType of the Extended Measurement Or Facts extension. The vocabulary was developed by a community of specialists in pollination biology and information science, including members of the TDWG Biological Interaction Data Interest Group, during almost four years of collaborative work. The vocabulary introduces 40 new terms, comprising many aspects of plant-pollinator interactions, and can be used to capture information produced by studies with different approaches and scales. The plant-pollinator interactions vocabulary is mainly a set of terms that can be both understood by people or interpreted by machines. The plant-pollinator vocabulary is composed of a defining a set of terms and descriptive documents explaining how the vocabulary is to be used. The terms in the vocabulary are divided into six categories: Animal, Plants, Flower, Interaction, Reproductive Success and Nectar Dynamics. The categories are not formally part of the vocabulary, they are used only to organize the vocabulary and to facilitate understanding by humans. We expect that the plant-pollinator vocabulary will contribute to data aggregation from a variety of sources worldwide at higher levels than we have experienced, significantly amplify plant-pollinator data availability for global synthesis, and contribute to knowledge in conservation and sustainable use of biodiversity. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
34. Multiple structure single parameter: analysis of a single protein nano environment descriptor characterizing a shared loci on structurally aligned proteins
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Salim, José Augusto, primary, Borro, Luiz, additional, Mazoni, Ivan, additional, Yano, Inácio, additional, Jardine, José G., additional, and Neshich, Goran, additional
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- 2016
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35. Brazilian Network on Plant-Pollinator Interactions: an update on the initiative of a standard for plantpollinator interactions data.
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Augusto Salim, José, Mauro Saraiva, Antonio, Agostini, Kayna, Wolowski, Marina, Veiga, Allan, Saragiotto Silva, Juliana, and Carvalheiro, Luisa G.
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POLLINATORS ,BIODIVERSITY conservation ,INFORMATION sharing - Abstract
The Brazilian Plant-Pollinator Interactions Network*1 (REBIPP) aims to develop scientific and teaching activities in plant-pollinator interaction. The main goals of the network are to: 1. generate a diagnosis of plant-pollinator interactions in Brazil; 2. integrate knowledge in pollination of natural, agricultural, urban and restored areas; 3. identify knowledge gaps; 4. support public policy guidelines aimed at the conservation of biodiversity and ecosystem services for pollination and food production; 5. and encourage collaborative studies among REBIPP participants. To achieve these goals the group has resumed and built on previous works in data standard definition done under the auspices of the IABIN-PTN (Etienne Américo et al. 2007) and FAO (Saraiva et al. 2010) projects (Saraiva et al. 2017). The ultimate goal is to standardize the ways data on plant-pollinator interactions are digitized, to facilitate data sharing and aggregation. A database will be built with standardized data from Brazilian researchers members of the network to be used by the national community, and to allow sharing data with data aggregators. To achieve those goals three task groups of specialists with similar interests and background (e.g botanists, zoologists, pollination biologists) have been created. Each group is working on the definition of the terms to describe plants, pollinators and their interactions. The glossary created explains their meaning, trying to map the suggested terms into Darwin Core (DwC) terms, and following the TDWG Standards Documentation Standard*2 in definition. Reaching a consensus on terms and their meaning among members of each group is challenging, since researchers have different views and concerns about which data are important to be included into a standard. That reflects the variety of research questions that underlie different projects and the data they collect. Thus, we ended up having a long list of terms, many of them useful only in very specialized research protocols and experiments, sometimes rarely collected or measured. Nevertheless we opted to maintain a very comprehensive set of terms, so that a large number of researchers feel that the standard meets their needs and that the databases based on it are a suitable place to store their data, thus encouraging the adoption of the data standard. An update of the work will soon be available at REBIPP website and will be open for comments and contributions. This proposal of a data standard is also being discussed within the TDWG Biological Interaction Data Interest Group*3 in order to propose an international standard for species interaction data. The importance of interaction data for guiding conservation practices and ecosystem services provision management has led to the proposal of defining Essential Biodiversity Variables (EBVs) related to biological interactions. Essential Biodiversity Variables (Pereira et al. 2013) were developed to identify key measurements that are required to monitoring biodiversity change. EBVs act as intermediate abstract layer between primary observations (raw data) and indicators (Niemeijer 2002). Five EBV classes have been defined in an initial stage: genetic composition, species populations, species traits, community composition, ecosystem function and ecosystem structure. Each EBV class defines a list of candidate EBVs for biodiversity change monitoring (Fig. 1). Consequently, digitalization of such data and making them available online are essential. Differences in sampling protocols may affect data scalability across space and time, hence imposing barriers to the full use of primary data and EBVs calculation (Henry et al. 2008). Thus, common protocols and methods should be adopted as the most straightforward approach to promote integration of collected data and to allow calculation of EBVs (Jürgens et al. 2011). Recently a Workshop was held by GLOBIS B*4 (GLOBal Infrastructures for Supporting Biodiversity research) to discuss Species Interactions EBVs (February, 26-28, Bari, Italy). Plant-pollinator interactions deserved a lot of attention and REBIPP's work was presented there. As an outcome we expect to define specific EBVs for interactions, and use plant- pollinators as an example, considering pairwise interactions as well as interaction network related variables. The terms in the plant-pollinator data standard under discussion at REBIPP will provide information not only on EBV related with interactions, but also on other four EBV classes: species populations, species traits, community composition, ecosystem function and ecosystem structure. As we said, some EBVs for specific ecosystem functions (e.g. pollination) lay beyond interactions network structures. The EBV 'Species interactions' (EBV class 'Community composition') should incorporate other aspects such as frequency (Vázquez et al. 2005), duration and empirical estimates of interaction strengths (Berlow et al. 2004). Overall, we think the proposed plant-pollinator interaction data standard which is currently being developed by REBIPP will contribute to data aggregation, filling many data gaps and can also provide indicators for long-term monitoring, being an essential source of data for EBVs. [ABSTRACT FROM AUTHOR]
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- 2018
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36. Gravitational eternally-collapsing compact objects
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Cuesta, H J M, Salim, José M, and Santos, N O
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General Relativity and Cosmology - Published
- 2005
37. Improving Predictions of Protein-Protein Interfaces by Combining Amino Acid-Specific Classifiers Based on Structural and Physicochemical Descriptors with Their Weighted Neighbor Averages
- Author
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de Moraes, Fábio R., primary, Neshich, Izabella A. P., additional, Mazoni, Ivan, additional, Yano, Inácio H., additional, Pereira, José G. C., additional, Salim, José A., additional, Jardine, José G., additional, and Neshich, Goran, additional
- Published
- 2014
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38. Unificando dados de interações bióticas: terminologia, análise de dados, padronização e proposta de um esquema de dados para interações planta-polinizador.
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Salim, José Augusto, primary
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39. Aplicação de técnicas de reconhecimento de padrões usando os descritores estruturais de proteínas da base de dados do software STING para discriminação do sítio catalítico de enzimas
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Augusto Salim, José, primary
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40. EINSTEIN'S GRAVITATIONAL LENSING AND NONLINEAR ELECTRODYNAMICS
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CUESTA, HERMAN J. MOSQUERA, primary, SALIM, JOSÉ M., additional, and DE FREITAS PACHECO, JOSÉ A., additional
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- 2006
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41. Effectiveness in the Use of Natural Gas for the Reduction of Atmospheric Emissions: Case Study—Industrial Sector in the Metropolitan Region of Santiago, Chile
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Corvalán, Roberto M., primary, Galecio, Javier I., additional, and Salim, José A., additional
- Published
- 2003
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42. Géologie, pétrologie et géochimie des skarns à scheelite de la mine Brejui, Currais Novos, région du Serido, NE du Brésil
- Author
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UCL - SC/GEO - Département de géologie et de géographie, Legrand, J.M., Verkaeren, Jean, Salim, José, UCL - SC/GEO - Département de géologie et de géographie, Legrand, J.M., Verkaeren, Jean, and Salim, José
- Abstract
Doctorat en sciences géologiques et minéralogiques -- UCL, 1994
- Published
- 1993
43. Dissipative cosmology with decaying vacuum energy
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Calvao, Mauricio O., primary, de Oliveira, Henrique P., additional, Pavón, Diego, additional, and Salim, José M., additional
- Published
- 1992
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44. Non-linear electrodynamics and the gravitational redshift of highly magnetized neutron stars.
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Mosquera Cuesta, Herman J. and Salim, José M.
- Subjects
- *
COSMIC electrodynamics , *REDSHIFT , *GRAVITATION , *PULSARS , *ELECTRODYNAMICS , *ASTROPHYSICS - Abstract
We show that non-linear electrodynamics (NLED) modifies in a fundamental basis the concept of gravitational redshift (GRS) as introduced by Einstein's theory of general relativity (GR). The effect becomes apparent when light propagation from super-strongly magnetized compact objects, such as pulsars, is under focus. The analysis, here based on the (exact) non-linear Lagrangian of, proves that unlike GR, where the GRS is independent of any background magnetic field (B-field), when NLED is incorporated into the photon dynamics, an effective GRS appears, which happens to depend decidedly on theB-field pervading the pulsar. The resulting GRS tends to infinity as theB-field grows larger, as opposed to the Einstein prediction. As in astrophysics, the GRS is used to infer the mass–radius relation, and thus the equation of state (EOS) of a compact star (for example, a neutron star;). This unexpected GRS critical change may mislead observers into considering that fundamental property: the EOS. Hence, a correct procedure to estimate those crucial physical properties demands a neat separation of the NLED effects from the pure gravitational ones in the light emitted by ultra-magnetized pulsars. [ABSTRACT FROM AUTHOR]
- Published
- 2004
- Full Text
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45. Nonlinear Electrodynamics and the Surface Redshift of Pulsars.
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Cuesta, Herman J. Mosquera and Salim, José M.
- Published
- 2004
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46. 1, 1, 1-Trichloropropanone: A Mild, Selective Acetylating Agent.
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Salim, José Roberto, Nome, Faruk, and Rezende, Marcos Caroli
- Published
- 1989
- Full Text
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47. Wave propagation in alternative theories of gravitation
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Pinheiro, Marcio Oliveira, Bergliaffa, Santiago Esteban Perez, Silva, Maria de Fátima Alves da, and Salim, José Martins
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propagação de ondas ,Teorias alternativas da gravitação ,shocks ,wave propagation ,Alternative theories of gravitation ,CIENCIAS EXATAS E DA TERRA::FISICA::FISICA GERAL::RELATIVIDADE E GRAVITACAO [CNPQ] - Abstract
Submitted by Boris Flegr (boris@uerj.br) on 2021-01-06T21:13:02Z No. of bitstreams: 1 DisertacaoMarcioFormatoUERJ 8.pdf: 1185419 bytes, checksum: 50c2985d0129f54d73b85f99209d9f59 (MD5) Made available in DSpace on 2021-01-06T21:13:02Z (GMT). No. of bitstreams: 1 DisertacaoMarcioFormatoUERJ 8.pdf: 1185419 bytes, checksum: 50c2985d0129f54d73b85f99209d9f59 (MD5) Previous issue date: 2012-05-31 Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro One way to generalize Einstein's theory of gravitation is by the addition of terms that depend on scalar formed with Ricci and Riemann tensors, such as (Ricci)2 or (Riemann)2 in the lagrangians.These theories have been intensively studied in recent years, since they can be used to describe the accelerated expansion of the universe in the standard cosmological model. One of the challenges to modify Einstein's theory is to limit the ambiguity in the choice of the dependence of the Lagrangian with the aforementioned scalars. The purpose of this dissertation is to put limits on the possible Lagrangians imposing that the waves(ie, linear perturbations) propagate in a vacuum without the appearance of shocks. Uma forma de generalizar a teoria de Einstein da gravitação é incorporar na lagrangiana termos que dependem de escalares formados com os tensores de Ricci e Riemann, tais como (Ricci)2, ou (Riemann)2. Estas teorias tem sido estudadas intensamente nos últimos anos, já que elas podem ser usadas para descrever a expansão acelerada do universo no modelo cosmológico standard. Entre os desfios de modificar a teoria de Einstein, se encontra o de limitar a ambiguidade na escolha da dependência da lagrangiana com os escalares antes mencionados. A proposta desta dissertação é a de colocar limites sobre as possíveis lagrangianas impondo que as ondas (isto é, perturbações lineares) se propaguem no vácuo sem que apareça, shocks.
- Published
- 2012
48. Numerical evolution of radiative spacetimes
- Author
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Rodrigues, Eduardo Lima, Oliveira, Henrique Pereira de, Sotomayor, Patricio Anibal Letelier, Skea, James Ewan Faskin, Salim, José Martins, and Silva, Maria de Fátima Alves da
- Subjects
Spectral methods ,Numerical relativity ,Métodos especiais ,Colapso gravitacional ,Gravitacional waves ,Ondas gravitacionais ,Relatividade numérica ,CIENCIAS EXATAS E DA TERRA::FISICA::FISICA GERAL::RELATIVIDADE E GRAVITACAO [CNPQ] ,Gravitacional colapse - Abstract
Submitted by Boris Flegr (boris@uerj.br) on 2021-01-06T21:02:36Z No. of bitstreams: 1 TESE-EDUARDO.pdf: 5285352 bytes, checksum: 5722697db1ee41ed0ae3c51348f286b6 (MD5) Made available in DSpace on 2021-01-06T21:02:36Z (GMT). No. of bitstreams: 1 TESE-EDUARDO.pdf: 5285352 bytes, checksum: 5722697db1ee41ed0ae3c51348f286b6 (MD5) Previous issue date: 2008-10-23 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior This work consists of applying spectral methods to obtain the evolution of isolated systems that can emit gravitational waves in the full nonlinear regime of General Relativity. The perspective of detection of gravitational waves in the next years means that the construction of angular and temporal patterns of gravitational waves emitted by systems that are strong candidates for intense sources of gravitational waves has become pressing.The evolution of spheroids of matter emitting gravitational waves and a null radiation field is studied in the realm of radiative Robinson-Trautman spacetimes. The null radiation field is expected in realistic gravitational collapse and can be either an incoherent superposition of waves of electromagnetic, neutrino or massless scalar fields. We studied the evolution of the angular pattern of gravitational wave emission and the mass extraction of the bounded configuration through the emission of both types of radiations. We present the first numerical code based on the Galerkin method to integrate the field equations of the Bondi problem. Several numerical tests were performed to verify the issues of convergence, stability and accuracy with promising results. This code opens up several possibilities of applications in more general scenarios for studying the evolution of spacetimes with gravitational waves. Este trabalho consiste na aplicação de métodos espectrais para obter a evolução de sistemas isolados que possam emitir ondas gravitacionais no regime não-linear pleno da Relatividade Geral. A perspectiva da detecção de ondas gravitacionais nos próximos anos torna premente a construção de padrões temporais e angulares de ondas gravitacionais emitidas por sistemas que são fortes candidatos a fontes intensas de ondas gravitacionais. Estudamos a evolução de esferóides de matéria emitindo ondas gravitacionais e um campo de radiação nula onde o espaço-tempo exterior é descrito pelas equações de Robinson- Trautman. O campo de radiação nula é esperado em um colapso gravitacional realístico e pode representar uma superposição incoerente de ondas eletromagnéticas, neutrinos ou campos escalares sem massa. Analisamos a evolução do espectro de emissão de ondas gravitacionais e a extração de massa do sistema devido à emissão de ambos os tipos de radiação. Apresentamos também o primeiro código numérico utilizando o método de Galerkin para integrar as equações de campo do problema de Bondi. Realizamos vários testes numéricos para verificar a convergência, estabilidade e precisão, obtendo resultados promissores. Esse código abre várias possibilidades de aplicações em cenários mais gerais de espaços-tempos com ondas gravitacionais.
- Published
- 2008
49. Psicologia e subjetividade
- Author
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Garcia-Roza, Luiz Alfredo, Institutos::ISOP, Penna, Marion Merlone dos Santos, Chateaubriand Filho, Oswaldo, Salim, José Martins, Nunes Filho, Eustachio Portela, and Penna, Antônio Gomes
- Subjects
Subjetividade ,Psicologia - Abstract
Este trabalho se propõe como uma análise histórica da questão da subjetividade tal como ela foi pensada desde sua emergência com Descartes, até Freud. Não se trata propriamente da história de um conceito, mas de uma abordagem histórica a um espaço mais amplo de questões que tem como referencial o sujeito e a subjetividade. O texto está dividido em três partes. Na Parte I, é analisada a emergência da subjetividade como objeto do saber e o esforço do racionalismo para identificá-la com a razão. A Parte 11, é dedicada à abordagem empirista e seus desdobramentos psicológicos. A Parte III é toda ela ocupada pela questão da clivagem da subjetividade operada pela teoria psicanalítica. O objetivo mais imediato do trabalho, é o de confrontar as virias concepções da subjetividade considerada como una e identificada com a consciência, ã concepção que nos é oferecida por Freud e que implica numa subjetividade clivada e num descentramento da razão. Face a este objetivo, a divisão do trabalho em suas duas partes iniciais, não se oferece como rigorosa mas visa apenas uma maior comodidade expositiva. O objetivo mais amplo do trabalho é, no entanto a delimitação da questão do platonismo que serve de tessitura ao conjunto dos discursos que compõem o texto, inclusive ao discurso psicanalítico. This work proposes to be a historical analysis of the question of subjectivity such as it has been understood since its inception from Descartes until Freud. It is not the history of a concept actually, but rather the historical approach of a broader area of matters with the individual and subjectivity as references. The text is divided into three parts. In Part I it is analysed the emergence of subjectivity as object of knowledge, and the effort of ·rationalism to identify it with the reason. Part II is concerning the empiricism approach and its psychological unfoldings. Part III is all concerned with the question of cleavage of subjectivity operated by psychoanalytical theory. The most immediate purpose of the work is to confront the various conceptions of subjectivity considered as one and identified with consciouness, with the conception as offered by Freud which implies a cleaved subjectivity and decentralization of reason. In the light of this purpose, the two initial parts of the work do not stand for a strict division, but are rather 50 divided for greater explanatory convenience. The broader purpose of the work, however, is the setting of the boundaries of the question of platonism that serves as tissue to the set of discourses which make up the text, including the psychoanalytical discourse.
- Published
- 1982
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